Mercedes-Benz 2003 S 430 Operator's Manual page 88

Controls in detail
Locking and unlocking
Restoring to factory setting
Press and hold buttons Œ and ‹
simultaneously for about six seconds
until battery check lamp 5 blinks twice.
Warning!
When leaving the vehicle, always remove the
SmartKey from the starter switch, take the
KEYLESS-GO* card (if so equipped) with you
and lock the vehicle. Do not leave children
unattended in the vehicle, or with access to
an unlocked vehicle. It is possible for chil-
dren to open a locked door from the inside,
which could result in an accident and/or se-
rious injury.
88
!
If you can no longer lock or unlock the
vehicle with the SmartKey, then either
the batteries in the SmartKey are dis-
charged or the SmartKey is malfunc-
tioning.
G
Check the batteries in the
SmartKey and replace them if nec-
essary ( page 328).
or
Use the mechanical key to unlock
the doors ( page 326) and trunk
( page 327) as required. Lock the
vehicle using the mechanical key
( page 327).
If the SmartKey is malfunctioning, con-
tact an authorized Mercedes-Benz Cen-
ter.
Checking the batteries
Press button ‹ or Œ .
Battery check lamp 5 lights up briefly
to indicate that the SmartKey batteries
are in order.
!
If battery check lamp 5 does not light
up briefly during check, the SmartKey
batteries are discharged.
Replace the batteries ( page 328).
You can obtain the required batteries
at any authorized Mercedes-Benz Cen-
ter.